View water level data in one of three categories: Current Conditions, Forecasts, and Historic Data. |
Visit our calendar of significant events related to regulation of Lake Superior and Lake Ontario as well as historic data for the connecting channels. |
Learn about the multitude of coastal issues, processes, and studies involved on the Great Lakes.
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Everything you want to know about Lake Winnebago in tabular and graphical format. |
Provides information related to basin precipitation and snow water equivalent.
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The home of the Lake Michigan Potential Damages Study and links to other studies of interest. |
Find the latest information on current conditions in the basin related to flooding in rivers, ice conditions on the connecting channels, and weather watches and warnings. |
Read about our latest news and upcoming meetings and download a variety of useful resources. |
Links to International Joint Commission Boards of Control, NOAA, Canadian Hydrographic Services, Chicago Diversion and other useful resources. |
Contact the Great Lakes Hydraulics and Hydrology Office |
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